SQL> select session_id from v$locked_object;
[list]
[*]SESSION_ID
[*]----------
[*] 43
[/list]
SQL> SELECT sid, serial#, username, osuser FROM v$session where sid = 43;
[list]
[*] SID SERIAL# USERNAME
[*]---------- ---------- ------------------------------
[*]OSUSER
[*]------------------------------
[*] 43 8907 SXITISMG
[*]tssx
[*]
[/list]
SQL> ALTER SYSTEM KILL SESSION '43,8907';
[list]
[*]System altered.
[/list]